Phil Taylor is concerned that playing too many late-night matches at the PDC World Championship could hamper his chances of winning a 17th world title.
Due to his high profile and popularity, Taylor is frequently selected as the headline act, meaning that his matches are often scheduled to take place at the end of an evening session.
However, 'The Power', who turned 53 earlier this year, is keen to avoid late finishes wherever possible.
"I can't do the late nights any more," Taylor told the Daily Star. "I can't be playing until midnight again.
"If I am scheduled to play at 10pm for example, I will - but I'd prefer not to now. It's too late for me.
"During the worlds, your rest time is so important. The late matches take their toll on the body."